Patents by Inventor Antje Mühlfeld

Antje Mühlfeld has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Liquid crystal mixtures
    Patent number: 7048974
    Abstract: The invention relates to TN and STN liquid-crystal displays and to the nematic liquid-crystal mixtures used therein, characterised in that they comprise one or more compounds of the formula I and one or more compounds of the formula II in which ring A, R1, R2 and Y are as defined in Claim 1.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: May 23, 2006
    Assignee: Merck Patentgesellschaft Mit Beschrankter Haftung
    Inventors: Antje Mühlfeld, Michael Junge, Harald Hirschmann, Sabine Schoen, Juliane Suermann, Ursula Patwal, Dagmar Zimmermann
  • Liquid-crystalline medium
    Patent number: 6730372
    Abstract: The invention relates to a liquid-crystalline medium which is characterized in that it comprises one or more compounds of the formula A and at least one compound of the formula B in which Ra, Rb, Y, Z1, Z2, L1, L2, L3, L4, L5, L6, L7 and L8 are as defined in claim 1.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: May 4, 2004
    Assignee: Merck Patent Gesellschaft mit Beschränkter Haftung
    Inventors: Harald Hirschmann, Dagmar Zimmermann, Ursula Patwal, Antje Mühlfeld, Sabine Schoen, Martina Weidner